es18xx.c

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				 SNDRV_PCM_INFO_MMAP_VALID),
	.formats =		(SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S8 | 
				 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE),
	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
	.rate_min =		4000,
	.rate_max =		48000,
	.channels_min =		1,
	.channels_max =		2,
	.buffer_bytes_max =	65536,
	.period_bytes_min =	64,
	.period_bytes_max =	65536,
	.periods_min =		1,
	.periods_max =		1024,
	.fifo_size =		0,
};

static int snd_es18xx_playback_open(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
        struct snd_es18xx *chip = snd_pcm_substream_chip(substream);

	if (substream->number == 0 && (chip->caps & ES18XX_PCM2)) {
		if ((chip->caps & ES18XX_DUPLEX_MONO) &&
		    chip->capture_a_substream && 
		    chip->capture_a_substream->runtime->channels != 1)
			return -EAGAIN;
		chip->playback_a_substream = substream;
	} else if (substream->number <= 1) {
		if (chip->capture_a_substream)
			return -EAGAIN;
		chip->playback_b_substream = substream;
	} else {
		snd_BUG();
		return -EINVAL;
	}
	substream->runtime->hw = snd_es18xx_playback;
	snd_pcm_hw_constraint_ratnums(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
				      (chip->caps & ES18XX_NEW_RATE) ? &new_hw_constraints_clocks : &old_hw_constraints_clocks);
        return 0;
}

static int snd_es18xx_capture_open(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
        struct snd_es18xx *chip = snd_pcm_substream_chip(substream);

        if (chip->playback_b_substream)
                return -EAGAIN;
	if ((chip->caps & ES18XX_DUPLEX_MONO) &&
	    chip->playback_a_substream &&
	    chip->playback_a_substream->runtime->channels != 1)
		return -EAGAIN;
        chip->capture_a_substream = substream;
	substream->runtime->hw = snd_es18xx_capture;
	snd_pcm_hw_constraint_ratnums(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
				      (chip->caps & ES18XX_NEW_RATE) ? &new_hw_constraints_clocks : &old_hw_constraints_clocks);
        return 0;
}

static int snd_es18xx_playback_close(struct snd_pcm_substream *substream)
{
        struct snd_es18xx *chip = snd_pcm_substream_chip(substream);

	if (substream->number == 0 && (chip->caps & ES18XX_PCM2))
		chip->playback_a_substream = NULL;
	else
		chip->playback_b_substream = NULL;
	
	snd_pcm_lib_free_pages(substream);
	return 0;
}

static int snd_es18xx_capture_close(struct snd_pcm_substream *substream)
{
        struct snd_es18xx *chip = snd_pcm_substream_chip(substream);

        chip->capture_a_substream = NULL;
	snd_pcm_lib_free_pages(substream);
        return 0;
}

/*
 *  MIXER part
 */

/* Record source mux routines:
 * Depending on the chipset this mux switches between 4, 5, or 8 possible inputs.
 * bit table for the 4/5 source mux:
 * reg 1C:
 *  b2 b1 b0   muxSource
 *   x  0  x   microphone
 *   0  1  x   CD
 *   1  1  0   line
 *   1  1  1   mixer
 * if it's "mixer" and it's a 5 source mux chipset then reg 7A bit 3 determines
 * either the play mixer or the capture mixer.
 *
 * "map4Source" translates from source number to reg bit pattern
 * "invMap4Source" translates from reg bit pattern to source number
 */

static int snd_es18xx_info_mux(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
	static char *texts4Source[4] = {
		"Mic", "CD", "Line", "Master"
	};
	static char *texts5Source[5] = {
		"Mic", "CD", "Line", "Master", "Mix"
	};
	static char *texts8Source[8] = {
		"Mic", "Mic Master", "CD", "AOUT",
		"Mic1", "Mix", "Line", "Master"
	};
	struct snd_es18xx *chip = snd_kcontrol_chip(kcontrol);

	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	uinfo->count = 1;
	switch (chip->version) {
	case 0x1868:
	case 0x1878:
		uinfo->value.enumerated.items = 4;
		if (uinfo->value.enumerated.item > 3)
			uinfo->value.enumerated.item = 3;
		strcpy(uinfo->value.enumerated.name, texts4Source[uinfo->value.enumerated.item]);
		break;
	case 0x1887:
	case 0x1888:
		uinfo->value.enumerated.items = 5;
		if (uinfo->value.enumerated.item > 4)
			uinfo->value.enumerated.item = 4;
		strcpy(uinfo->value.enumerated.name, texts5Source[uinfo->value.enumerated.item]);
		break;
	case 0x1869: /* DS somewhat contradictory for 1869: could be be 5 or 8 */
	case 0x1879:
		uinfo->value.enumerated.items = 8;
		if (uinfo->value.enumerated.item > 7)
			uinfo->value.enumerated.item = 7;
		strcpy(uinfo->value.enumerated.name, texts8Source[uinfo->value.enumerated.item]);
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

static int snd_es18xx_get_mux(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	static unsigned char invMap4Source[8] = {0, 0, 1, 1, 0, 0, 2, 3};
	struct snd_es18xx *chip = snd_kcontrol_chip(kcontrol);
	int muxSource = snd_es18xx_mixer_read(chip, 0x1c) & 0x07;
	if (!(chip->version == 0x1869 || chip->version == 0x1879)) {
		muxSource = invMap4Source[muxSource];
		if (muxSource==3 && 
		    (chip->version == 0x1887 || chip->version == 0x1888) &&
		    (snd_es18xx_mixer_read(chip, 0x7a) & 0x08)
		) 
			muxSource = 4;
	}
	ucontrol->value.enumerated.item[0] = muxSource;
	return 0;
}

static int snd_es18xx_put_mux(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	static unsigned char map4Source[4] = {0, 2, 6, 7};
	struct snd_es18xx *chip = snd_kcontrol_chip(kcontrol);
	unsigned char val = ucontrol->value.enumerated.item[0];
	unsigned char retVal = 0;

	switch (chip->version) {
 /* 5 source chips */
	case 0x1887:
	case 0x1888:
		if (val > 4)
			return -EINVAL;
		if (val == 4) {
			retVal = snd_es18xx_mixer_bits(chip, 0x7a, 0x08, 0x08) != 0x08;
			val = 3;
		} else
			retVal = snd_es18xx_mixer_bits(chip, 0x7a, 0x08, 0x00) != 0x00;
 /* 4 source chips */
	case 0x1868:
	case 0x1878:
		if (val > 3)
			return -EINVAL;
		val = map4Source[val];
		break;
 /* 8 source chips */
	case 0x1869:
	case 0x1879:
		if (val > 7)
			return -EINVAL;
		break;
	default:
		return -EINVAL;
	}
	return (snd_es18xx_mixer_bits(chip, 0x1c, 0x07, val) != val) || retVal;
}

#define snd_es18xx_info_spatializer_enable	snd_ctl_boolean_mono_info

static int snd_es18xx_get_spatializer_enable(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_es18xx *chip = snd_kcontrol_chip(kcontrol);
	unsigned char val = snd_es18xx_mixer_read(chip, 0x50);
	ucontrol->value.integer.value[0] = !!(val & 8);
	return 0;
}

static int snd_es18xx_put_spatializer_enable(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_es18xx *chip = snd_kcontrol_chip(kcontrol);
	unsigned char oval, nval;
	int change;
	nval = ucontrol->value.integer.value[0] ? 0x0c : 0x04;
	oval = snd_es18xx_mixer_read(chip, 0x50) & 0x0c;
	change = nval != oval;
	if (change) {
		snd_es18xx_mixer_write(chip, 0x50, nval & ~0x04);
		snd_es18xx_mixer_write(chip, 0x50, nval);
	}
	return change;
}

static int snd_es18xx_info_hw_volume(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 2;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = 63;
	return 0;
}

static int snd_es18xx_get_hw_volume(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_es18xx *chip = snd_kcontrol_chip(kcontrol);
	ucontrol->value.integer.value[0] = snd_es18xx_mixer_read(chip, 0x61) & 0x3f;
	ucontrol->value.integer.value[1] = snd_es18xx_mixer_read(chip, 0x63) & 0x3f;
	return 0;
}

#define snd_es18xx_info_hw_switch	snd_ctl_boolean_stereo_info

static int snd_es18xx_get_hw_switch(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_es18xx *chip = snd_kcontrol_chip(kcontrol);
	ucontrol->value.integer.value[0] = !(snd_es18xx_mixer_read(chip, 0x61) & 0x40);
	ucontrol->value.integer.value[1] = !(snd_es18xx_mixer_read(chip, 0x63) & 0x40);
	return 0;
}

static void snd_es18xx_hwv_free(struct snd_kcontrol *kcontrol)
{
	struct snd_es18xx *chip = snd_kcontrol_chip(kcontrol);
	chip->master_volume = NULL;
	chip->master_switch = NULL;
	chip->hw_volume = NULL;
	chip->hw_switch = NULL;
}

static int snd_es18xx_reg_bits(struct snd_es18xx *chip, unsigned char reg,
			       unsigned char mask, unsigned char val)
{
	if (reg < 0xa0)
		return snd_es18xx_mixer_bits(chip, reg, mask, val);
	else
		return snd_es18xx_bits(chip, reg, mask, val);
}

static int snd_es18xx_reg_read(struct snd_es18xx *chip, unsigned char reg)
{
	if (reg < 0xa0)
		return snd_es18xx_mixer_read(chip, reg);
	else
		return snd_es18xx_read(chip, reg);
}

#define ES18XX_SINGLE(xname, xindex, reg, shift, mask, invert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
  .info = snd_es18xx_info_single, \
  .get = snd_es18xx_get_single, .put = snd_es18xx_put_single, \
  .private_value = reg | (shift << 8) | (mask << 16) | (invert << 24) }

static int snd_es18xx_info_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
	int mask = (kcontrol->private_value >> 16) & 0xff;

	uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 1;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = mask;
	return 0;
}

static int snd_es18xx_get_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_es18xx *chip = snd_kcontrol_chip(kcontrol);
	int reg = kcontrol->private_value & 0xff;
	int shift = (kcontrol->private_value >> 8) & 0xff;
	int mask = (kcontrol->private_value >> 16) & 0xff;
	int invert = (kcontrol->private_value >> 24) & 0xff;
	int val;
	
	val = snd_es18xx_reg_read(chip, reg);
	ucontrol->value.integer.value[0] = (val >> shift) & mask;
	if (invert)
		ucontrol->value.integer.value[0] = mask - ucontrol->value.integer.value[0];
	return 0;
}

static int snd_es18xx_put_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_es18xx *chip = snd_kcontrol_chip(kcontrol);
	int reg = kcontrol->private_value & 0xff;
	int shift = (kcontrol->private_value >> 8) & 0xff;
	int mask = (kcontrol->private_value >> 16) & 0xff;
	int invert = (kcontrol->private_value >> 24) & 0xff;
	unsigned char val;
	
	val = (ucontrol->value.integer.value[0] & mask);
	if (invert)
		val = mask - val;
	mask <<= shift;
	val <<= shift;
	return snd_es18xx_reg_bits(chip, reg, mask, val) != val;
}

#define ES18XX_DOUBLE(xname, xindex, left_reg, right_reg, shift_left, shift_right, mask, invert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
  .info = snd_es18xx_info_double, \
  .get = snd_es18xx_get_double, .put = snd_es18xx_put_double, \
  .private_value = left_reg | (right_reg << 8) | (shift_left << 16) | (shift_right << 19) | (mask << 24) | (invert << 22) }

static int snd_es18xx_info_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
	int mask = (kcontrol->private_value >> 24) & 0xff;

	uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 2;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = mask;
	return 0;
}

static int snd_es18xx_get_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_es18xx *chip = snd_kcontrol_chip(kcontrol);
	int left_reg = kcontrol->private_value & 0xff;
	int right_reg = (kcontrol->private_value >> 8) & 0xff;
	int shift_left = (kcontrol->private_value >> 16) & 0x07;
	int shift_right = (kcontrol->private_value >> 19) & 0x07;
	int mask = (kcontrol->private_value >> 24) & 0xff;
	int invert = (kcontrol->private_value >> 22) & 1;
	unsigned char left, right;
	
	left = snd_es18xx_reg_read(chip, left_reg);
	if (left_reg != right_reg)
		right = snd_es18xx_reg_read(chip, right_reg);
	else
		right = left;
	ucontrol->value.integer.value[0] = (left >> shift_left) & mask;
	ucontrol->value.integer.value[1] = (right >> shift_right) & mask;
	if (invert) {
		ucontrol->value.integer.value[0] = mask - ucontrol->value.integer.value[0];
		ucontrol->value.integer.value[1] = mask - ucontrol->value.integer.value[1];
	}
	return 0;
}

static int snd_es18xx_put_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_es18xx *chip = snd_kcontrol_chip(kcontrol);
	int left_reg = kcontrol->private_value & 0xff;
	int right_reg = (kcontrol->private_value >> 8) & 0xff;
	int shift_left = (kcontrol->private_value >> 16) & 0x07;
	int shift_right = (kcontrol->private_value >> 19) & 0x07;
	int mask = (kcontrol->private_value >> 24) & 0xff;
	int invert = (kcontrol->private_value >> 22) & 1;
	int change;
	unsigned char val1, val2, mask1, mask2;
	
	val1 = ucontrol->value.integer.value[0] & mask;
	val2 = ucontrol->value.integer.value[1] & mask;
	if (invert) {
		val1 = mask - val1;
		val2 = mask - val2;
	}
	val1 <<= shift_left;
	val2 <<= shift_right;
	mask1 = mask << shift_left;
	mask2 = mask << shift_right;
	if (left_reg != right_reg) {
		change = 0;
		if (snd_es18xx_reg_bits(chip, left_reg, mask1, val1) != val1)
			change = 1;
		if (snd_es18xx_reg_bits(chip, right_reg, mask2, val2) != val2)
			change = 1;
	} else {
		change = (snd_es18xx_reg_bits(chip, left_reg, mask1 | mask2, 
					      val1 | val2) != (val1 | val2));
	}
	return change;
}

/* Mixer controls
 * These arrays contain setup data for mixer controls.
 * 
 * The controls that are universal to all chipsets are fully initialized
 * here.
 */
static struct snd_kcontrol_new snd_es18xx_base_controls[] = {
ES18XX_DOUBLE("Master Playback Volume", 0, 0x60, 0x62, 0, 0, 63, 0),
ES18XX_DOUBLE("Master Playback Switch", 0, 0x60, 0x62, 6, 6, 1, 1),
ES18XX_DOUBLE("Line Playback Volume", 0, 0x3e, 0x3e, 4, 0, 15, 0),
ES18XX_DOUBLE("CD Playback Volume", 0, 0x38, 0x38, 4, 0, 15, 0),
ES18XX_DOUBLE("FM Playback Volume", 0, 0x36, 0x36, 4, 0, 15, 0),
ES18XX_DOUBLE("Mic Playback Volume", 0, 0x1a, 0x1a, 4, 0, 15, 0),
ES18XX_DOUBLE("Aux Playback Volume", 0, 0x3a, 0x3a, 4, 0, 15, 0),
ES18XX_SINGLE("Record Monitor", 0, 0xa8, 3, 1, 0),
ES18XX_DOUBLE("Capture Volume", 0, 0xb4, 0xb4, 4, 0, 15, 0),
{
	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
	.name = "Capture Source",
	.info = snd_es18xx_info_mux,
	.get = snd_es18xx_get_mux,
	.put = snd_es18xx_put_mux,
}
};

static struct snd_kcontrol_new snd_es18xx_recmix_controls[] = {
ES18XX_DOUBLE("PCM Capture Volume", 0, 0x69, 0x69, 4, 0, 15, 0),
ES18XX_DOUBLE("Mic Capture Volume", 0, 0x68, 0x68, 4, 0, 15, 0),
ES18XX_DOUBLE("Line Capture Volume", 0, 0x6e, 0x6e, 4, 0, 15, 0),
ES18XX_DOUBLE("FM Capture Volume", 0, 0x6b, 0x6b, 4, 0, 15, 0),
ES18XX_DOUBLE("CD Capture Volume", 0, 0x6a, 0x6a, 4, 0, 15, 0),
ES18XX_DOUBLE("Aux Capture Volume", 0, 0x6c, 0x6c, 4, 0, 15, 0)
};